GCN Circular 5759
Subject
GRB061025: ROTSE-III Confirmation of Optical Counterpart
Event
Date
2006-10-26T19:56:13Z (19 years ago)
From
Fang Yuan at ROTSE <yuanfang@umich.edu>
F. Yuan (U Mich), E.S. Rykoff (U Mich) report on behalf of the ROTSE
collaboration:
Further analysis of the early ROTSE-IIIc images (Rykoff, et al, GCN
5752) reveals a faint, fading afterglow at the XRT position (Mineo, et
al, GCN 5753) consistent with the position of the i-band candidate
reported by Berger (GCN 5754). This source was not detected in the
original analysis because of source confusion with a nearby star, and
because the afterglow is near our detection threshold.
In our initial 5 s image beginning at 18:36:46.6 UT, 44.7 s after the
burst, the afterglow is at 15.6+/-0.2 mag calibrated relative to USNO
B1.0 (R). It decays with a power law index ~ -0.9 up to ~155 s after
the burst when it is no longer detected.
start UT end UT t_exp(s) mag t_start-tGRB(s) Coadd?
--------------------------------------------------------------------
18:36:46.6 18:36:51.6 5 15.6+/-0.2 44.7 N